(Adds Bush comments, paragraphs 7, 17 and 18)
By Matt Spetalnick and Paul Taylor
BUCHAREST, April 1 (Reuters) - U.S. President George W. Bush vowed on Tuesday to press NATO to put Ukraine and Georgia on the road to membership despite resistance from Russia and scepticism from the alliance's European members.
Visiting Kiev on the way to Romania for his farewell NATO summit, starting on Wednesday, Bush said Moscow had no right to veto bids by the two former Soviet republics to join the 26-nation Western defence pact.
But French Prime Minister Francois Fillon said Paris would oppose giving Kiev and Tbilisi a "Membership Action Plan" -- a roadmap to joining NATO -- to avoid upsetting the balance of power with Russia. Germany shares those objections.
Bush told a news conference with Ukrainian President Viktor Yushchenko: "In Bucharest this week, I will continue to make America's position clear. We support MAP for Ukraine and Georgia.
"Helping Ukraine move towards NATO membership is in the interest of every member in the alliance and will help advance security and freedom in this region and around the world."
Bush will repeat that message in a pre-summit speech in Bucharest on Wednesday and add that "NATO membership must remain open to all of Europe's democracies that seek it, and are ready to share in the responsibilities of NATO membership."
He will also use the speech to underline Washington's determination to build parts of an anti-missile defence system in central Europe despite Russian objections.
On other summit issues, Greece said it was unlikely to resolve a dispute over the name of NATO aspirant Macedonia in time for the former Yugoslav republic to be invited to join the alliance this week despite strong pressure from Washington.
And Fillon told parliament in Paris that France may send a few hundred extra troops to Afghanistan to help NATO's biggest military mission, apparently fewer than the 1,000 combat troops President Nicolas Sarkozy was expected to announce in Bucharest.
France and Germany, backed by several smaller west European allies, say Ukraine and Georgia do not meet NATO's criteria.
Public support in Ukraine for joining NATO is barely 30 percent, and Georgia does not control all of its territory because of frozen conflicts with Moscow-backed separatists.
"POINT OF NO RETURN"
Russia denounces the bids on grounds that NATO is intruding on its sphere of influence.
Moscow's envoy to NATO, Dmitry Rogozin, told Interfax news agency: "The Membership Action Plan marks the point of no return, in our opinion. If MAP is granted to Georgia and Ukraine ... our relations would take a dramatic turn."
President Vladimir Putin is due to attend the NATO summit on Friday and has invited Bush to his holiday home in Sochi on the Black Sea afterwards to discuss a "legacy agreement" on future arms control.
Diplomats have sketched a possible trade-off, in which Moscow would grudgingly accept U.S. plans to deploy its anti-missile defence shield in central Europe and Washington would accept a delay in the Georgian and Ukrainian NATO bids.
But Bush underscored his resolve to back the applications. He dismissed as a "misperception" any trade-off -- shelving support for MAP bids to win agreement to deploy interceptor rockets and a radar in Poland and the Czech Republic.
"The need for missile defence in Europe is real and it is urgent," Bush will say in his speech on Wednesday, according to excerpts released by the White House. Washington says the system is needed to protect against "rogue states", meaning Iran.
Bush will also urge NATO to "maintain its resolve and finish the fight in Afghanistan", and say that the alliance's top priority must be fighting al Qaeda and Osama bin Laden.
Speaking after talks with Romanian President Traian Basescu, NATO Secretary-General Jaap de Hoop Scheffer said the summit showed "Afghanistan matters to the international community".
At a session on Thursday, NATO allies and other troop contributors will meet U.N. Secretary-General Ban Ki-moon and Afghan President Hamid Karzai to discuss better coordination of military, civilian, development and humanitarian efforts.
The head of the U.S. House of Representatives Armed Services Committee, Ellen Tauscher, said European allies must do much more to help NATO defeat Taliban insurgents in Afghanistan, where the alliance's credibility was at stake.
"While the U.S. is committing an additional 3,200 Marines, NATO allies must commit at least 7,000 more combat troops to secure the East and South of Afghanistan," she told a Bucharest conference on the eve of the summit.
Basescu, the summit's host, urged NATO leaders to invite Croatia, Albania and Macedonia to join, and to give three other Western Balkans states -- Serbia, Bosnia and Montenegro -- "a clear perspective concerning their return to their rightful place in the European and Euro-Atlantic community". (Additional reporting by Susan Cornwell in Kiev, Justyna Pawlak and Mark John in Bucharest and Francois Murphy in Paris; Editing by Timothy Heritage)